The Universe. Our Solar System. Pluto.

Pluto is the small planet in the Solar System. From September 7th of 2006 has the number 134340, issued by the Minor Planet Center.

There are four moons of Pluto known. The largest satellite of Pluto is Charon. Charon, of all the moons in the solar sistem, is the largest compared to its host planet, ie no other moon is approximately the size of the planet as it orbits.

So similar size with Pluto and Charon makes them cause the effect of double planet, the other system "satellite-planet" that has an effect similar to that of Pluto and Charon is the case of the Earth and Moon.